Let's get this math done. We have 380 and we're going to multiply it by 343. This is the same as taking 380 and adding it to itself 343 times.
Step 1: 0 + 380 = 380
Step 2: 380 + 380 = 760
Step 3: 760 + 380 = 1140
Step 4: 1140 + 380 = 1520
Step 5: 1520 + 380 = 1900
Step 6: 1900 + 380 = 2280
Step 7: 2280 + 380 = 2660
Step 8: 2660 + 380 = 3040
Step 9: 3040 + 380 = 3420
Step 10: 3420 + 380 = 3800
Step 11: 3800 + 380 = 4180
Step 12: 4180 + 380 = 4560
Step 13: 4560 + 380 = 4940
Step 14: 4940 + 380 = 5320
Step 15: 5320 + 380 = 5700
Step 16: 5700 + 380 = 6080
Step 17: 6080 + 380 = 6460
Step 18: 6460 + 380 = 6840
Step 19: 6840 + 380 = 7220
Step 20: 7220 + 380 = 7600
Step 21: 7600 + 380 = 7980
Step 22: 7980 + 380 = 8360
Step 23: 8360 + 380 = 8740
Step 24: 8740 + 380 = 9120
Step 25: 9120 + 380 = 9500
Step 26: 9500 + 380 = 9880
Step 27: 9880 + 380 = 10260
Step 28: 10260 + 380 = 10640
Step 29: 10640 + 380 = 11020
Step 30: 11020 + 380 = 11400
Step 31: 11400 + 380 = 11780
Step 32: 11780 + 380 = 12160
Step 33: 12160 + 380 = 12540
Step 34: 12540 + 380 = 12920
Step 35: 12920 + 380 = 13300
Step 36: 13300 + 380 = 13680
Step 37: 13680 + 380 = 14060
Step 38: 14060 + 380 = 14440
Step 39: 14440 + 380 = 14820
Step 40: 14820 + 380 = 15200
Step 41: 15200 + 380 = 15580
Step 42: 15580 + 380 = 15960
Step 43: 15960 + 380 = 16340
Step 44: 16340 + 380 = 16720
Step 45: 16720 + 380 = 17100
Step 46: 17100 + 380 = 17480
Step 47: 17480 + 380 = 17860
Step 48: 17860 + 380 = 18240
Step 49: 18240 + 380 = 18620
Step 50: 18620 + 380 = 19000
Step 51: 19000 + 380 = 19380
Step 52: 19380 + 380 = 19760
Step 53: 19760 + 380 = 20140
Step 54: 20140 + 380 = 20520
Step 55: 20520 + 380 = 20900
Step 56: 20900 + 380 = 21280
Step 57: 21280 + 380 = 21660
Step 58: 21660 + 380 = 22040
Step 59: 22040 + 380 = 22420
Step 60: 22420 + 380 = 22800
Step 61: 22800 + 380 = 23180
Step 62: 23180 + 380 = 23560
Step 63: 23560 + 380 = 23940
Step 64: 23940 + 380 = 24320
Step 65: 24320 + 380 = 24700
Step 66: 24700 + 380 = 25080
Step 67: 25080 + 380 = 25460
Step 68: 25460 + 380 = 25840
Step 69: 25840 + 380 = 26220
Step 70: 26220 + 380 = 26600
Step 71: 26600 + 380 = 26980
Step 72: 26980 + 380 = 27360
Step 73: 27360 + 380 = 27740
Step 74: 27740 + 380 = 28120
Step 75: 28120 + 380 = 28500
Step 76: 28500 + 380 = 28880
Step 77: 28880 + 380 = 29260
Step 78: 29260 + 380 = 29640
Step 79: 29640 + 380 = 30020
Step 80: 30020 + 380 = 30400
Step 81: 30400 + 380 = 30780
Step 82: 30780 + 380 = 31160
Step 83: 31160 + 380 = 31540
Step 84: 31540 + 380 = 31920
Step 85: 31920 + 380 = 32300
Step 86: 32300 + 380 = 32680
Step 87: 32680 + 380 = 33060
Step 88: 33060 + 380 = 33440
Step 89: 33440 + 380 = 33820
Step 90: 33820 + 380 = 34200
Step 91: 34200 + 380 = 34580
Step 92: 34580 + 380 = 34960
Step 93: 34960 + 380 = 35340
Step 94: 35340 + 380 = 35720
Step 95: 35720 + 380 = 36100
Step 96: 36100 + 380 = 36480
Step 97: 36480 + 380 = 36860
Step 98: 36860 + 380 = 37240
Step 99: 37240 + 380 = 37620
Step 100: 37620 + 380 = 38000
Step 101: 38000 + 380 = 38380
Step 102: 38380 + 380 = 38760
Step 103: 38760 + 380 = 39140
Step 104: 39140 + 380 = 39520
Step 105: 39520 + 380 = 39900
Step 106: 39900 + 380 = 40280
Step 107: 40280 + 380 = 40660
Step 108: 40660 + 380 = 41040
Step 109: 41040 + 380 = 41420
Step 110: 41420 + 380 = 41800
Step 111: 41800 + 380 = 42180
Step 112: 42180 + 380 = 42560
Step 113: 42560 + 380 = 42940
Step 114: 42940 + 380 = 43320
Step 115: 43320 + 380 = 43700
Step 116: 43700 + 380 = 44080
Step 117: 44080 + 380 = 44460
Step 118: 44460 + 380 = 44840
Step 119: 44840 + 380 = 45220
Step 120: 45220 + 380 = 45600
Step 121: 45600 + 380 = 45980
Step 122: 45980 + 380 = 46360
Step 123: 46360 + 380 = 46740
Step 124: 46740 + 380 = 47120
Step 125: 47120 + 380 = 47500
Step 126: 47500 + 380 = 47880
Step 127: 47880 + 380 = 48260
Step 128: 48260 + 380 = 48640
Step 129: 48640 + 380 = 49020
Step 130: 49020 + 380 = 49400
Step 131: 49400 + 380 = 49780
Step 132: 49780 + 380 = 50160
Step 133: 50160 + 380 = 50540
Step 134: 50540 + 380 = 50920
Step 135: 50920 + 380 = 51300
Step 136: 51300 + 380 = 51680
Step 137: 51680 + 380 = 52060
Step 138: 52060 + 380 = 52440
Step 139: 52440 + 380 = 52820
Step 140: 52820 + 380 = 53200
Step 141: 53200 + 380 = 53580
Step 142: 53580 + 380 = 53960
Step 143: 53960 + 380 = 54340
Step 144: 54340 + 380 = 54720
Step 145: 54720 + 380 = 55100
Step 146: 55100 + 380 = 55480
Step 147: 55480 + 380 = 55860
Step 148: 55860 + 380 = 56240
Step 149: 56240 + 380 = 56620
Step 150: 56620 + 380 = 57000
Step 151: 57000 + 380 = 57380
Step 152: 57380 + 380 = 57760
Step 153: 57760 + 380 = 58140
Step 154: 58140 + 380 = 58520
Step 155: 58520 + 380 = 58900
Step 156: 58900 + 380 = 59280
Step 157: 59280 + 380 = 59660
Step 158: 59660 + 380 = 60040
Step 159: 60040 + 380 = 60420
Step 160: 60420 + 380 = 60800
Step 161: 60800 + 380 = 61180
Step 162: 61180 + 380 = 61560
Step 163: 61560 + 380 = 61940
Step 164: 61940 + 380 = 62320
Step 165: 62320 + 380 = 62700
Step 166: 62700 + 380 = 63080
Step 167: 63080 + 380 = 63460
Step 168: 63460 + 380 = 63840
Step 169: 63840 + 380 = 64220
Step 170: 64220 + 380 = 64600
Step 171: 64600 + 380 = 64980
Step 172: 64980 + 380 = 65360
Step 173: 65360 + 380 = 65740
Step 174: 65740 + 380 = 66120
Step 175: 66120 + 380 = 66500
Step 176: 66500 + 380 = 66880
Step 177: 66880 + 380 = 67260
Step 178: 67260 + 380 = 67640
Step 179: 67640 + 380 = 68020
Step 180: 68020 + 380 = 68400
Step 181: 68400 + 380 = 68780
Step 182: 68780 + 380 = 69160
Step 183: 69160 + 380 = 69540
Step 184: 69540 + 380 = 69920
Step 185: 69920 + 380 = 70300
Step 186: 70300 + 380 = 70680
Step 187: 70680 + 380 = 71060
Step 188: 71060 + 380 = 71440
Step 189: 71440 + 380 = 71820
Step 190: 71820 + 380 = 72200
Step 191: 72200 + 380 = 72580
Step 192: 72580 + 380 = 72960
Step 193: 72960 + 380 = 73340
Step 194: 73340 + 380 = 73720
Step 195: 73720 + 380 = 74100
Step 196: 74100 + 380 = 74480
Step 197: 74480 + 380 = 74860
Step 198: 74860 + 380 = 75240
Step 199: 75240 + 380 = 75620
Step 200: 75620 + 380 = 76000
Step 201: 76000 + 380 = 76380
Step 202: 76380 + 380 = 76760
Step 203: 76760 + 380 = 77140
Step 204: 77140 + 380 = 77520
Step 205: 77520 + 380 = 77900
Step 206: 77900 + 380 = 78280
Step 207: 78280 + 380 = 78660
Step 208: 78660 + 380 = 79040
Step 209: 79040 + 380 = 79420
Step 210: 79420 + 380 = 79800
Step 211: 79800 + 380 = 80180
Step 212: 80180 + 380 = 80560
Step 213: 80560 + 380 = 80940
Step 214: 80940 + 380 = 81320
Step 215: 81320 + 380 = 81700
Step 216: 81700 + 380 = 82080
Step 217: 82080 + 380 = 82460
Step 218: 82460 + 380 = 82840
Step 219: 82840 + 380 = 83220
Step 220: 83220 + 380 = 83600
Step 221: 83600 + 380 = 83980
Step 222: 83980 + 380 = 84360
Step 223: 84360 + 380 = 84740
Step 224: 84740 + 380 = 85120
Step 225: 85120 + 380 = 85500
Step 226: 85500 + 380 = 85880
Step 227: 85880 + 380 = 86260
Step 228: 86260 + 380 = 86640
Step 229: 86640 + 380 = 87020
Step 230: 87020 + 380 = 87400
Step 231: 87400 + 380 = 87780
Step 232: 87780 + 380 = 88160
Step 233: 88160 + 380 = 88540
Step 234: 88540 + 380 = 88920
Step 235: 88920 + 380 = 89300
Step 236: 89300 + 380 = 89680
Step 237: 89680 + 380 = 90060
Step 238: 90060 + 380 = 90440
Step 239: 90440 + 380 = 90820
Step 240: 90820 + 380 = 91200
Step 241: 91200 + 380 = 91580
Step 242: 91580 + 380 = 91960
Step 243: 91960 + 380 = 92340
Step 244: 92340 + 380 = 92720
Step 245: 92720 + 380 = 93100
Step 246: 93100 + 380 = 93480
Step 247: 93480 + 380 = 93860
Step 248: 93860 + 380 = 94240
Step 249: 94240 + 380 = 94620
Step 250: 94620 + 380 = 95000
Step 251: 95000 + 380 = 95380
Step 252: 95380 + 380 = 95760
Step 253: 95760 + 380 = 96140
Step 254: 96140 + 380 = 96520
Step 255: 96520 + 380 = 96900
Step 256: 96900 + 380 = 97280
Step 257: 97280 + 380 = 97660
Step 258: 97660 + 380 = 98040
Step 259: 98040 + 380 = 98420
Step 260: 98420 + 380 = 98800
Step 261: 98800 + 380 = 99180
Step 262: 99180 + 380 = 99560
Step 263: 99560 + 380 = 99940
Step 264: 99940 + 380 = 100320
Step 265: 100320 + 380 = 100700
Step 266: 100700 + 380 = 101080
Step 267: 101080 + 380 = 101460
Step 268: 101460 + 380 = 101840
Step 269: 101840 + 380 = 102220
Step 270: 102220 + 380 = 102600
Step 271: 102600 + 380 = 102980
Step 272: 102980 + 380 = 103360
Step 273: 103360 + 380 = 103740
Step 274: 103740 + 380 = 104120
Step 275: 104120 + 380 = 104500
Step 276: 104500 + 380 = 104880
Step 277: 104880 + 380 = 105260
Step 278: 105260 + 380 = 105640
Step 279: 105640 + 380 = 106020
Step 280: 106020 + 380 = 106400
Step 281: 106400 + 380 = 106780
Step 282: 106780 + 380 = 107160
Step 283: 107160 + 380 = 107540
Step 284: 107540 + 380 = 107920
Step 285: 107920 + 380 = 108300
Step 286: 108300 + 380 = 108680
Step 287: 108680 + 380 = 109060
Step 288: 109060 + 380 = 109440
Step 289: 109440 + 380 = 109820
Step 290: 109820 + 380 = 110200
Step 291: 110200 + 380 = 110580
Step 292: 110580 + 380 = 110960
Step 293: 110960 + 380 = 111340
Step 294: 111340 + 380 = 111720
Step 295: 111720 + 380 = 112100
Step 296: 112100 + 380 = 112480
Step 297: 112480 + 380 = 112860
Step 298: 112860 + 380 = 113240
Step 299: 113240 + 380 = 113620
Step 300: 113620 + 380 = 114000
Step 301: 114000 + 380 = 114380
Step 302: 114380 + 380 = 114760
Step 303: 114760 + 380 = 115140
Step 304: 115140 + 380 = 115520
Step 305: 115520 + 380 = 115900
Step 306: 115900 + 380 = 116280
Step 307: 116280 + 380 = 116660
Step 308: 116660 + 380 = 117040
Step 309: 117040 + 380 = 117420
Step 310: 117420 + 380 = 117800
Step 311: 117800 + 380 = 118180
Step 312: 118180 + 380 = 118560
Step 313: 118560 + 380 = 118940
Step 314: 118940 + 380 = 119320
Step 315: 119320 + 380 = 119700
Step 316: 119700 + 380 = 120080
Step 317: 120080 + 380 = 120460
Step 318: 120460 + 380 = 120840
Step 319: 120840 + 380 = 121220
Step 320: 121220 + 380 = 121600
Step 321: 121600 + 380 = 121980
Step 322: 121980 + 380 = 122360
Step 323: 122360 + 380 = 122740
Step 324: 122740 + 380 = 123120
Step 325: 123120 + 380 = 123500
Step 326: 123500 + 380 = 123880
Step 327: 123880 + 380 = 124260
Step 328: 124260 + 380 = 124640
Step 329: 124640 + 380 = 125020
Step 330: 125020 + 380 = 125400
Step 331: 125400 + 380 = 125780
Step 332: 125780 + 380 = 126160
Step 333: 126160 + 380 = 126540
Step 334: 126540 + 380 = 126920
Step 335: 126920 + 380 = 127300
Step 336: 127300 + 380 = 127680
Step 337: 127680 + 380 = 128060
Step 338: 128060 + 380 = 128440
Step 339: 128440 + 380 = 128820
Step 340: 128820 + 380 = 129200
Step 341: 129200 + 380 = 129580
Step 342: 129580 + 380 = 129960
Step 343: 129960 + 380 = 130340

So, 380*343 = 130340